Alloy aluminum cage with precisely phased roller pocket spacing in radial and angular location.

Transcription

1

2 The Company Marland Since 1931, Marland has been producing backstops, clutches and clutch couplings. Marland products are based on a oneway clutch design, utilizing the principle of cylindrical rollers on inclined cam planes. Marland Clutch also brings to the North American market a line of proven sprag type freewheel clutches. Marland utilizes the knowledge of its sister divisions, Stieber of Germany and Formsprag of the United States, to manufacture world class high performance sprag clutches in the United States. Marland Products The Marland principle of rollers on inclined cam planes has proven its dependability for over 60 years in worldwide installations ranging from food processing plants to equipment used in steel mills and heavy mining industries. Proving the inherently long-life Marland design, the first two Marland clutch units installed in February, 1931, operated continuously for 31 years without repairs or replacements of any kind until the system became obsolete in Cam, rollers and outer race inspection showed them ready for additional years of service. The need for CECON Clutches Marland CECON Clutches are designed for applications where one or more of the following conditions exists. 1. Shaft speeds exceed the permissible maximum for standard clutches, clutch couplings, or backstops. 2. Uninterrupted, continuous operation is required. 3. Operation under extremely wet, dusty, abrasive, or other adverse atmospheric conditions; or on unprotected outdoor applications; or subject to high ambient temperatures. 4. Shaft axis is not horizontal, as on cement kiln drives. 5. Lubrication maintenance must be provided on a no "down-time" basis. Illustration 1 Alloy aluminum cage with precisely phased roller pocket spacing in radial and angular location. Rollers, cam and outer race, hardened roller bearing steels. Cover Photo: A hydraulic recovery turbine connected through a Marland CECON clutch assists the main motor decreasing motor current demand. Springs insure positive engagement even for rapid indexing up to 240 strokes per minute. Cam ground with same precisely phased cam lobe spacing as used for the cage. 2 Marland Clutch ( )

3 Operating Details CECON Clutches consist of a completely enclosing housing with provisions for supporting a Marland freewheeling clutch between two shafts, each of which is separately supported. The input shaft is connected to the cam and the output shaft is connected to the outer race. The CECON shafts are then connected to driving and driven equipment shafts through double engagement, self-aligning, gear-type flexible couplings. During freewheeling, the outer race, as shown by the arrow in Illustration 2, is free to rotate with the output shaft. The cam and roller assembly connected to the input shaft remain stationary, or rotate at a speed slower than the output shaft. An oil film wedges and separates the rollers from the outer race. This moves the rollers a few thousandths of Illustration 2 Coverplate and roller cage end ring have been removed, exposing the rollers. Note that while at rest, all rollers are strictly inphase ready to share the load when transmitting torque. Rollers an inch imparting relative angular motion between the roller cage and cam. This slight movement of the rollers into the deeper cam zones, with a clean lubricant film wedge between rollers and outer race, permits freewheeling without metal to metal contact. At rest (or at any synchronous speed of the input and output shafts), the spring actuated roller cage, Illustration 1, has already positioned the rollers into the contact zone. All rollers have been positively guided to engage uniformly and maintain their relative positions accurately to assure uniform load distribution. The rollers then engage in compression between the precision ground and hardened, cam plane surfaces and the inside diameter of the outer race. When the clutch is in this "engaged" or "driving" condition, the cam, rollers and outer race are locked and therefore, not subject to wear. Outer Race The two types of CECON Clutches are Type CEUS and Type CEUHS. Both contain similar standard clutch operating parts and therefore, operate in the same manner. The basic differences are the means of lubrication and method of bearing support. Type CEUS CECONS are ball bearing supported at four points and are suitable for use on most applications. Lubrication is self-contained in the sealed housing and provides self-circulation and selffiltering through stainless steel filter strainers. Type CEUHS CECONS have high speed, turbine type, steel backed babbited bearings at four points which are lubricated by a customer supplied external lubrication system, through standard A.S.A. flanged oil inlet and drain furnished on the housing. This bearing and lubrication arrangement permits higher operating speeds than the CEUS type. Since the Type CEUS CECON is suitable for most applications, the following design and application information will be based on this type unit. However, the type CEUHS is readily available for speeds above the CEUS limits or wherever a sleeve bearing supported unit is preferred. Disconnect Feature Both CEUS and CEUHS CECONS are available with a disconnect feature that provides physical separation of the input and output shafts. This allows maintenance to be performed on the nonenergized driver while the disconnect CECON is locked out in the disconnect position. Other features include: View port which allows visual confirmation of disconnect/connect status. Full-speed testing of isolated equipment prior to reconnection. Direct replacement for existing CEUS and CEUHS units. Roller Cage Cam Marland Clutch ( ) 3

4 Design Feature The basic clutch elements of cam, roller cage and outer race are similar items as employed for other Marland Clutches. In addition, CECON Clutches are designed to keep freewheeling clutch parts and bearings adequately lubricated. Housings are of rugged, cast construction with liberal cooling areas to permit dissipation of heat which may be generated during high speed freewheeling operation. The stationary housing also provides a large oil reservoir with many times the oil capacity of an ordinary freewheeling clutch. Provision is made against unnecessary churning of the oil. This is done by ample reservoirs to hold the excess oil volume out of the rotating clutch chamber during high speed operation. The oil, caught in the reservoirs, is cooled and is then recirculated in controlled volume from the bottom of these reservoirs. In addition to permitting high shaft speeds and continuous uninterrupted operation, the following design features are equally important in certain applications. Operation On Other Than The Horizontal Plane Cement and other pyro kilns have drive systems that are not horizontal. Under these conditions a standard freewheeling clutch coupling might tend to lose its lubricant while the shafts were not in a horizontal plane. Problem Atmospheres CECON Clutches are also intended for use on stationary, horizontal applications where extreme atmosphere pollution caused by outdoor sand, dust and wind action, rain or sleet might contaminate the lubricant in a standard freewheeling clutch coupling. Even if some such contamination should inadvertently pollute the lubricant in a CECON Clutch, means for sedimentation of such foreign matter are provided in the lubricant reservoir and fittings. Gravity separation permits withdrawal of the impurities from the lubricant without interrupting continuous operation. Maintenance CECON Clutches Type CEUS are continuously self-lubricated without the use of pumps or external piping. The selfcirculating lubricant is also self-filtering by continuous gravity flow through 100- mesh stainless steel filter-strainers. Means are provided for easy renewal of the filtering elements. The only dependence on the human element is that of visually checking oil level, occasional sampling for oil purity and cleaning of filter strainers, none of which requires shut-down of the equipment. A breather-filter is provided to compensate for barometric and temperature changes. Oil Sampling A drain valve on the easiest-to-reach side of the CECON Clutch permits sampling of the lubricant to help detect the presence of any contaminant and draining if necessary. Equipment which must operate in cement mills, chemical plants, highly humid plant areas, or in high ambient temperatures or similar problem atmospheres are well served by CECON Clutches even though uninterrupted operation is not compulsory. Photo: A Marland CECON clutch in an unprotected outdoor location at a West Coast hydrocarbon processing plant. 4 Marland Clutch ( )

5 Advantages of Marland Cylindrical Rollers on Flat Inclined Cam Surfaces Free Rotation The cylindrical rollers used in all Marland clutch products are free to rotate in their individual pockets during freewheeling permitting the load to be engaged and reengaged on any part of the roller circumference and cylinder surface as indicated by the arrows in Illustration 3. Longer Service Life Engagement of the roller under load does not always fall on the same line, zone, or spot to result in spalling or cratering, as may occur with non-cylindrical, irregularly shaped wedges or sprags which are not free to rotate. This results in longer service life for the contacting surfaces. Accurate Dimensions Cylindrical rollers are easy to produce and reproduce to precision dimension limits which are readily checked with micrometers, go-no-go gauges, or if necessary, with the extreme closeness of light band inspection. Full Contact Precision-ground, flat cam areas furnish ideal contacting surfaces for the cylindrical rollers and assure full contact with the entire cylinder length of each roller. Lower Stress When roller and cam are engaged under compressive loading, Iillustration 3), the load is uniformly distributed over a large zone of contact with consequently lower stresses to result in more durable, efficient operation. The Limitation of Non-Cylindrical Clutch Wedges or Sprags Non-cylindrical, irregularly shaped wedges or sprags have been resorted to by some designers whose primary aim was to lower clutch production costs. This design uses a cheaper cylindrical inner race, in place of the precision ground cam used in the Marland design. Odd-shaped sprag elements with compound curves are difficult to produce, and reproduce, to the same high degree of accuracy consistently maintained in the production of cylindrical rollers. Many non-cylindrical sprags, produced by cold die drawing, may be subject to dimensional variations which can occur between sprags produced when the die is new and those drawn after the die becomes worn and enlarged with use. When an assembly of such odd-shaped sprag elements is engaged in compressive loading between the inner and outer races, dimensional variations Illustration 3 such as a slightly oversized curve radius, will subject such individual elements to higher stress and may cause failure due to spalling or cratering of the relatively higher stressed surfaces. Sprags with compound curves are not free-to-rotate when confined within the annular space between cylindrical inner and outer races, but must be retained in position to engage. This causes a rubbing of the sprags on the races during freewheeling and consequent wear. In addition, sprag contact surface for engaging is limited to the small zone indicated by the arrows in illustration 4. This reduced available zone of contact can result in shorter life of wedges or sprags. Note in Illustrations 3 and 4, the available load-bearing surface of a Marland roller includes the entire roller circumference and full cylinder length, compared to the relatively limited load-bearing zone of the retained sprag. Illustration 3 Marland cylindrical rollers are free to rotate during free wheeling and provide broad contact over the entire length of the rollers under compressive loading. Illustration 4 Non-cylindrical clutch wedges are not free to rotate. Any dimensional variations are accentuated by repeated contact in the same reduced areas during compressive loading. Illustration 4 Marland Clutch ( ) 5

6 Typical Applications Dual Drives For dual drive arrangements, CECON Clutches connected between the driven equipment and the power sources, provide for instantaneous changeover from one source of power to the other without delays for manually loosening, tightening or shifting standby drive connections. In Illustration 5, a large electric motor and steam turbine are connected to double shaft extensions of a continuously operating high speed pump through Marland CECON Clutches. The following operating modes exist: 1. Either the motor or the steam turbine may be used to drive the pump. 2. Both motor and turbine may share the pump load, depending on torque and speed characteristics of the prime movers. 3. If the motor is driving the pump at rated speed, the load may be taken over by the turbine without slowing down the pump. If required, the turbine may be used to increase the pump speed above the rated motor speed, but within permissible clutch speed rating, after which the motor may be shut off. 4. The turbine alone may drive the pump at any permissible clutch speed to suit varying operating demands Photo: Dual driven induced draft fan through Marland CECONS to provide process steam at a Southern chemical plant Illustration 5 1. Turbine 2. Flexible Coupling 3. Marland CECON Clutch 4. Compressor Pump or Blower 5. Motor 6 Marland Clutch ( )

7 Typical Applications Inching or Creep Drives A Marland CECON Clutch connected between a low speed drive and the normal operating speed drive for conveyors, steel strip mills, or other equipment, will permit operation at inching or creeping speed for inspection or servicing. Such drives are necessarily limited to one direction of rotation and cannot be reversible. CECON clutch allows automatic and instantaneous change-over from one drive to the other without complex controls. The application of a Marland CECON Clutch to provide inching speed for an inclined conveyor is shown in the illustration to the right. Such very low speed drives may be required where exposure to freezing temperatures prevents restarting, if not kept in constant slow motion Illustration 6 1. Marland Backstop 2. Conveyor Belt Headshaft 3. Flexible Coupling 4. Main Speed Reducer 5. Main Motor 6. Marland CECON Clutch 7. Inching or Creep Drive Motor Starter or Turning Gear Drives Large, heavy-duty industrial fans often require turning gear drives to keep the fan impellers rotating slowly when the main drive is shut down. Without this slow rotation in high temperature applications, such as induced draft and hot gas recirculating fans, the impeller will heat or cool unevenly and distort the blades or shaft. In addition, slow rotation may be necessary to insure proper lubrication of fan bearings. In some cases, the turning gear drive and the CECON clutch are size selected to start the fan from rest before the larger high-speed motor is turned on. (See Illustration 7) Photo: Hot gas recirculating fan turning gear drive through CECON clutch provides continuous slow rotation to prevent thermal distortion and keep fan bearings properly lubricated. Illustration 7 1. Main Drive 2. Flexible Coupling 3. Fan or Compressor 4. Marland CECON Clutch 5. Turning Gear Drive Marland Clutch ( ) 7

8 Typical Applications Energy Recovery Systems Energy recovery in hydrocarbon processing plants is an important factor in the reduction of operating costs. Wherever a high pressure liquid flow is reduced to a lower pressure, hydraulic energy is wasted. By the application of a hydraulic turbine and a CECON clutch, most of this energy can be recovered. The hydraulic turbine is connected to the CECON Clutch input shaft, and the output shaft is connected to the double extended motor shaft or pump shaft. The motor is usually sized to carry the full pump load for those times, such as startup, when little or no fluid is available to the hydraulic turbine. During these periods the CECON Clutch is freewheeling, allowing the hydraulic turbine to remain stationary. As process fluid flow increases, the hydraulic turbine accelerates until it reaches the speed of the motor. The CECON clutch automatically engages to transmit hydraulic turbine torque to the motor, decreasing the motor current demand. The CECON clutch will automatically engage and disengage if the hydraulic turbine speed varies with the change in the flow of the process fluid. Photo: Two Type CEUHS CECON clutches at large Texas refinery used with hydraulic turbines to recover energy from process fluid Illustration 8 1 Main Pump 2 Coupling 3 Main Motor 4 Gear-Type Coupling 5 Marland CECON Clutch 6 Gear-Type Spacer Coupling 7 Hydraulic Turbine 8 Marland Clutch ( )

9 Typical Applications Kiln Emergency Drive For some time the trend in the cement and other pyro-processing industries has been toward larger and more efficient kilns. Since these kilns operate 24 hours per day, month after month, it has been important to conserve power and avoid down time as much as possible. The high degree of efficiency in the mechanical power transmission that has evolved also means that the kiln can roll back due to the large off-center mass of material in the kiln when power failure occurs or at any time the main drive is shut down. Uncontrolled rollback carries the danger of centrifugal explosion of the main drive components since they may be oversped to many times the normal forward speed. Another consideration to be made during main drive shutdown is the prevention of kiln distortion due to the high temperatures. An emergency drive can be utilized to provide forward rotation at a reduced speed, both to prevent distortion and also to empty the contents of the kiln before it becomes impacted to the lining. Marland CECON clutches and CEBMAG backstops provide automatic, remote emergency operation in case of main electric power failure. Their use provides controlled reversal of the kiln and automatic changeover to emergency drive for forward rotation at reduced speed. The first Marland CECON clutch installed on a cement kiln went into operation over 35 years ago. Since that time many of the largest kilns in this country and throughout the world have been provided with CECON and CEBMAG units. For more detailed information on CEBMAG backstops, refer to the CEBMAG catalog. Photo: Marland CECON clutch and CEBMAG Backstop on modern cement kiln provide for emergency drive rotation in case of main power shutdown. Marland Clutch ( ) 9

10 Special Applications High Speed Backstops Standard Marland backstops are recommended for use at low speeds, as on conveyor drive pulley shaft, instead of at motor speed or on other high speed shafts. However, there are many applications for backstops on equipment having only high speed shafts available. Examples of this type of application include motor or turbine driven pumps, compressors or blowers. When power failure or shutdown occurs, the common header for the air or fluid may cause reverse rotation of the equipment if check valves fail to shut off the reverse flow. During such reversals the equipment can rapidly accelerate to dangerously high speeds. A CECON backstop will prevent reversal of the connected equipment, thereby guarding against the possibility of centrifugal explosion or other damage. CECON backstop units are provided with all the features as outlined for CECON clutches to permit continuous operation at medium to high speeds. The only modification is a torque arm attached to the CECON input shaft. The end of the torque arm is positively retained as shown in Illustration Special Requirements In over 60 years as the recognized leader in the design and manufacturer of freewheeling clutches, the Marland engineering staff has been given many unusual and difficult requirements for clutches and backstops. This has resulted in special designs to meet those exacting requirements. If your needs cannot be filled by a standard item, give us the engineering details. It may be that we already have the solution to your problems, and if not, we ll go to work and find one. Illustration 9 1 Compressor, Pump, or Blower 2 Flexible Coupling 3 Marland CECON Highspeed Backstop 4 Motor Photo: Marland backstop prevents reversal of pump if check valves should fail during power failure. 10 Marland Clutch ( )

11 CECON Clutch Size Selection Selection of a Marland CECON Clutch requires the following information: 1. Nameplate horsepower of drive (motor, turbine, engine, etc.) 2. RPM of driving shaft. 3. RPM of driven shaft (freewheeling speed) 4. Kind of machines to be connected (driving and driven) 5. Direction of driving rotation when facing input end of CECON. 6. Where the CECON Clutch shafts will not be on a horizontal plane, refer to the factory indicating angular position. 7. For dual drive arrangements requiring a second CECON Clutch, similar information as outlined above applying to the alternate drive should be obtained to assure selection of a proper size CECON Clutch for the alternate driver. Note: High Speed Operation CEUS CECON clutches overrunning or driving at speeds above those shown below may require matching or balancing of components for proper operation and long life. Consult factory for restriction and additional costs. CEUS-5C-8M CEUS-12M-30M CEUS-42M-60M 1,800 RPM 1,200 RPM 900 RPM Selection Procedure 1. Calculate the normal load torque (T) in pound-feet Nameplate Horsepower x 5,250 T = RPM of Clutch Input Shaft 2. Select the proper service factor (SF) from Table based on actual connected equipment or by the class of service most closely resembling the service conditions under consideration. If an exact or similar application is not shown in Table, or if special conditions exist, refer to Home Office with complete information. 3. Multiply the normal load (T) by service factor (SF) to obtain the required clutch torque. 4. Refer to the CECON capacity ratings as shown on Page 12 for type CEUS, or Page 16 if type CEUHS is preferred or required by speed of application, and select the required size. The shaft sizes of the driving and driven equipment need not be considered in selecting the CECON Clutch size since the CECON input and output shafts are to be connected to the driving and driven shafts through suitable sizes of doubleengagement, self-aligning, gear-type flexible couplings. If Marland is to furnish the couplings, the micrometer shaft diameters and keyseat dimensions of the driving and driven equipment must be furnished to assure proper coupling selection. Service Factors The following service factors are for typical applications shown in this catalog. They are not intended as a firm recommendation, but are offered only as a general guide: Motor and Turbine Driven-Dual Drives: Forced Draft Fans 1.50 Induced Draft Fans 1.50 Centrifugal Pumps 1.50 Inching or Creep Drives 1.50 Starter or Turning Gear Drives 1.50 Energy Recover Systems 1.50 Kiln Emergency Drives 1.25 Engine Driven refer to Factory Applications not shown contact the Factory. Marland Clutch ( ) 11

12 Marland CECON Clutches Type CEUS Breather-Filter Input Shaft Running oil level gauge. Minimum running level indicated on housing. Friction Hand Brake Output Shaft Gear-Type double engagement flexible coupling Driving Machine D D Gear-Type double engagement flexible coupling Driven Machine E E F F Shaft Gap ** H H Shaft Gap ** Usable Usable Shaft Shaft Length Length R J J R K A K A CECON Clutch Rated Torque Capacity HP # RPM Approx. Oil Ship Wght. lbs. CEUS Type lb. ft. Per 100 RPM Maximum Capacity qts. (Less Cplgs.) 5C /2 6, ** Shaft gap per coupling manufacturer or customer specification # For higher speeds, consult factory. 1M 1, , M 2, , M 4, , M 8, , M 12, , ,200 18M 18, , ,600 30M 30, , ,000 42M 42, , ,500 60M 60,000 1,143 1, ,000 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings. 12 Marland Clutch ( )

13 Dimensions and Data C B Drain Valve L M Dia. Static Oil Level Gage Static level indicated on housing S 4 P P N O N O 2 CECON Clutch Dimensions in Inches CEUS Type A B C D *E F H J K L M N O P R S 5C M M M M x x x x x M x M x M x M x M x * Shaft dia /-.0010, Coupling bore / Marland Clutch ( ) 13

14 Marland CECON Clutches Type CEUHS "W" 300 lb. A.S.A. Flange. Oil drain line supplied by customer. "S" 300 lb. A.S.A. Flange. Oil inlet line supplied by customer. For oil specifications see below. Gear-Type double engagement flexible coupling Friction Hand Brake Breather Filter Gear-Type double engagement flexible coupling Input Shaft Output Shaft Driving Machine D D Driving Machine E E F M Dia. F Shaft Gap** H Usable Shaft Length R J K 1-1/2 V L J K R H Usable Shaft Length Shaft Gap** Option: Oil drain can be furnished on opposite side A A CECON Clutch Rated Torque Capacity HP # RPM Oil Supply Ship Wght. lbs. CEUHS Type lb. ft. Per 100 RPM Maximum Gals. Per Min. + (Less Cplgs.) 1M 1, , / M 2, , / M 4, , / M 8, , ,200 12M 12, , ,700 18M 18, , ,500 30M 30, , ,200 42M 42, , ,600 60M 60,000 1,143 3, ,100 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings. ** Shaft gap per coupling manufacturer or customer specification # For higher speeds consult factory. + To be supplied by customer: This quantity of regular turbine oil of approx S.S.U. at 100 degree F., at P.S.I. pressure, at a max. inlet temp. of 110 degree F., filtered to microns. 14 Marland Clutch ( )

15 Dimensions and Data Units can be furnished with proximity probes and/or RTD s. "Customer to supply oil pressure gauge at oil inlet." T C B U Z Y P X N O N O P CECON Clutch Dimensions in Inches CEUHS Type A B C D *E F H J K L M N O P R S T U V W X Y Z 1M x M x M x M x M x M x M x M x M x * Shaft dia /-.0010, Coupling bore / Marland Clutch ( ) 15

16 Marland CECON Clutches Type CEUS Part Description Gasket Gasket 11 13A Gasket Gasket Brake Stud Nut 2 Brake Stud 3 Brake Stud Washer 4 Brake Handle 5 Brake Thrust Screw 6 Brake Seal Cover & Seal 7 Housing Cover & Gasket 8 Running Oil Level Gage 9 Brake Shoe 10 Oil Slinger 11 Shaft Seal Cover & Gasket 12 Input Shaft 13 Shaft Packing 13A Oil Seal 14 Ball Bearing 15 Clutch Housing 16 Bolts & Locknuts for Bearing Spacer 18 Clutch Coverplate 19 Cam Spacer 20 Outer Race & Gaskets 21 Cam 22 Clutch Roller Assembly 23 Drain Valve 24 Housing End Plate & Gasket 25 Cam Retainer & Fasteners 26 Flange Output Shaft 27 Oil Flow Plug 28 Clutch Stop Lug 29 Screws & Lockwashers for Housing Hood & Gasket 31 Oil Strainer Basket 32 Oil Strainer Housing 33 Oil Tray 34 Oil Strainer Stem 35 Strainer Inspection Cap 36 Breather-Filter 37 Pipe Nipple 38 Clutch Spring 39 Clutch Cam Key 40 Static Oil Level Gage 41 Eye Bolt 42 Screws & Lockwashers for Screws & Lockwashers for 7 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings Marland Clutch ( )

17 Marland CECON Clutches Type CEUHS Part Description 1 Brake Stud Nut 2 Brake Stud Gasket 3 Brake Stud Washer 4 Brake Handle Brake Thrust Screw 6 Brake Seal Cover & Seal 7 Clutch Housing Cover 8 Inspection Cover Brake Shoe Oil Slinger Packing Seal Cover & Gasket 12 Input Shaft 13 Shaft Packing Gasket Shaft Bearing & Fasteners 15 Clutch Housing 16 Bearing Cap 17 Bearing Cap with Oil Flow 18 Oil Inlet Flange 19 Oil Drain Flange 20 Clutch Outer Race Clutch Cam 22 Clutch Roller Assembly 23 Clutch Spring 24 Clutch Cam Key 25 Cam Retainer & Fasteners 26 Flanged Output Shaft 27 Clutch Oil Flow Plug 28 Clutch Stop Lug 29 Eye Bolt Breather-Filter 31 Bolts & Locknuts for Screws & Lockwashers for Screws & Lockwashers for Fasteners for 16 & Fasteners for 7 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings Marland Clutch ( ) 17

18 Marland CECON Disconnect Clutch The Disconnect CECON is a completely mechanical overrunning clutch. It has been designed as a "no downtime" power transmission product. The Disconnect CECON is well suited for applications that demand uninterrupted operation or in hostile environmental conditions. Like all other Marland CECON clutches, it has been engineered to provide long and reliable life with a minimum of maintenance. Features Complete physical separation of the input and output shaft. Torque ratings to 60,000 lb/ft Speeds to 12,000 RPM Manual mechanical disconnect Total system isolation (US PAT.) Visual confirmation of lockout Benefits Long life High reliability Minimum maintenance Allows maintenance of isolated equipment Permits full speed testing of isolated equipment Re-connection without system shut down Direct replacement for existing CEUS & CEUHS units The need for CECON Clutches Marland One-Way CECON Clutches are designed for applications where one or more of the following conditions exist: 1. Shaft speeds exceed the permissible maximum for standard clutches, clutch couplings, or backstops. 2. Uninterrupted, continuous operation is required. 3. Operation under extremely wet, dusty, abrasive or other adverse atmospheric conditions; or on unprotected outdoor applications; or subject to high ambient temperatures. 4. Shaft axis is not horizontal, as on cement kiln drives. 5. Lubrication maintenance must be provided on a no "downtime" basis. CECON Clutches consist of a completely enclosed housing with provisions for supporting a Marland freewheeling clutch between two shafts, each of which is separately supported. The input shaft is connected to the cam and the output shaft is connected to the outer race. The CECON shafts are then connected to the driving and driven equipment shafts through double engagement, self-aligning, gear-type flexible couplings. During freewheeling, the outer race is free to rotate with the output shaft. The cam and roller assembly connected to the input shaft remain stationary, or rotate at a speed slower than the output shaft. An oil film wedges and separates the rollers from the outer race. This moves the rollers a few thousandths of an inch imparting relative angular motion between the roller cage and cam. This slight movement of the rollers into the deeper cam zones, with a clean lubricant film wedge between roller and outer race, permits freewheeling without metal to metal contact. At rest (or at any synchronous speed of the input and output shafts), the spring actuated roller cage has already positioned the rollers into the contact zone. All rollers have been positively guided to engage uniformly and maintain their relative positions accurately to assure uniform load distribution. The rollers then engage in compression between the precision ground and hardened cam plane surfaces and the inside diameter of the outer race. When the clutch is in the "engaged" or "driving" condition, the cam, rollers and outer race are locked and therefore, not subject to wear. In addition, the disconnect CECON allows maintenance to be performed on the nonenergized driver without system shutdown. This is accomplished by physically separating the input and output ends of the clutch, and providing a means for locking the clutch in the disconnect mode. The two types of CECON Disconnect Clutches are Type CEUSD and Type CEUHSD. Both contain similar standard clutch operating parts and therefore, operate in the same manner. The basic differences are the means of lubrication and method of bearing support. Type CEUSD Disconnect CECONS are ball bearing supported at four points and are suitable for use on most applications. Lubrication is self-contained in the sealed housing and provides self circulation. Type CEUHSD Disconnect CECONS have high speed turbine type, steel backed babbited bearings at four points which re lubricated by a customer supplied external lubrication system, through standard A.S.A. flanged oil inlet and drain furnished on the housing. This bearing and lubrication arrangement permits higher operating speeds than the CEUSD type. The Type CEUSD Disconnect CECON is suitable for most applications. However, the type CEUHSD is readily available for speeds above the CEUSD limits or wherever a sleeve bearing supported unit is preferred. 18 Marland Clutch ( )

19 Marland CECON Disconnect Clutch Disconnected Illustration 10 depicts the clutch in the disconnected condition. Note that the cam and roller assembly have been physically removed from the outer race, providing a separation of the input and output end of the clutch. In this position, the input end cannot be backdriven by the output end. It is also possible to test the isolated driver at operating speed before reconnection. Inspection Cover Marland CECON Shift Assembly DISCONNECTED POSITION Outer Race Shift Fork Output Shaft (Rest of shift assembly not shown for clarity) CONNECTED POSITION Cam & Roller Assembly Illustration 11 Input Shaft Illustration 10 Connected Illustration 11 shows the CECON clutch in its connected, normal operating condition. The cam and roller assembly are in position, relative to the outer race, to operate as a normal overrunning clutch to transmit torque in the driving rotation or freewheel when the alternate energy source is actuated. On January 2, 1990, OSHA Control of Hazardous Energy (Lockout/Tagout) in Volume 29 of the Code of Federal Regulation (29 CFR), Section went into effect. In general this rule requires that, "before servicing or maintenance is performed on machinery or equipment, the machinery or equipment must be turned off and disconnected from the energy source, and the energy-isolating device must be either locked or tagged out." OSHA provides these following definitions: Energy-isolating device Any mechanical device that physically prevents the transmission or release of energy. Lockout device Any device that uses positive means such as a lock, either key or combination type, to hold an energy-isolated device in a safe position, thereby preventing the energizing of machinery or equipment. The Disconnect CECON meets the first condition by the physical separation of the input and output shafts, NOT by the mere locking of the input shaft to the clutch housing. The second condition is met when the clutch is locked by an authorized employee. The Disconnect CECON is unique to the industry. While the main drive is in operation, maintenance can be performed on isolated equipment when the clutch is in a locked out position (as detailed in our service manual). The clutch has a lockout indication system, as well as a view port which allows for visual confirmation or disconnect/connect status. The total system isolation feature also allows for the full speed testing of isolated equipment, at typical operating speeds, prior to reconnection. With the Disconnect CECON, removal and reinstallation of couplings is not required. This benefit means less time (and therefore less money) is associated with each maintenance outage. To return to service, all that is required is the re-connection of the Disconnect CECON and the starting of the power train. This can be accomplished at any overrunning RPM. The Disconnect CECONs are direct replacements for the equivalent sized CEUS and CEUHS units. This allows for the replacement of these non-lockout devices without requiring the expense of relocation of equipment. In summary, the CEUSD and CEUHSD Disconnect CECON provides the best means to meet OSHA "isolation and lockout" requirements. The Disconnect CECON provides dollar savings with regard to the replacement of existing non-disconnect clutches without the related expense of equipment relocation. Additional savings are realized as the Disconnect CECON allows for both maintenance and full speed testing of isolated equipment. These benefits are coupled with MARLAND CLUTCH Division s continuous commitment to providing the most reliable and cost effective means of meeting the needs of the industry. Marland Clutch ( ) 19

20 Marland Disconnect CEUSD CECON Clutch Shift lever locking assembly Gear-Type double engagement flexible coupling E Shaft Dia. D Keyway (Input shaft) Breather-Filter H Usable Shaft Length Shift Lever H Usable Shaft Length Gear-Type double engagement flexible coupling E Shaft Dia. D Keyway (Output shaft) Driving Machine Driving Machine Shaft Gap** Shaft Gap** F F R R A J K J K A CECON Clutch Rated Torque Capacity HP RPM Approx. Oil Ship. Wght. lbs. CEUSD Type lb. ft. Per 100 RPM Maximum Capacity Qts. (Less Cplgs.) 1M 1, , M 2, , M 4, , M 8, , M 12, , ,200 18M 18, , ,600 30M 30, , ,000 42M 42, , ,500 60M 60,000 1,143 1, ,000 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings. ** Shaft gap per coupling manufacturer or customer specification For higher speeds, consult factory 20 Marland Clutch ( )

21 Marland Disconnect CEUSD CECON Clutch Running oil level gage Static oil level gage level indicated on housing. Dimension shown indicates oil level height. C Drain Valve B S 4" P L M Dia. P N O N O Dimensions inches (mm) For Reference Only Model A B C D E* F H J 1M (249.24) 5.75 (146.05) (400.05).375 x 188 (9.53 x 4.78) 1.75 (44.45) (92.08) (92.08) (161.93) 2M (295.28) (174.63) (457.20).625 x.313 (15.88 x 7.95) (58.75) (104.78) 4.25 (107.95) (187.33) 4M (325.45) 7.75 (196.85) (508.00).625 x.313 (15.88 x 7.95) 2.75 (69.85) 4.75 (120.65) (123.83) 7.75 (196.85) 8M (374.65) (219.08) (539.75).875 x.438 (22.23 x 11.13) (84.15) (149.23) 6.00 (152.40) (231.78) 12M (433.40) (244.48) (590.55) 1.00 x.50 (25.40 x 12.70) (98.43) (161.93) 6.50 (165.10) (273.05) 18M (481.03) (285.75) (654.05) 1.00 x.50 (25.40 x 12.70) (109.55) (174.63) 7.00 (177.80) (295.28) 30M (533.40) (323.85) (749.30) 1.25 x.625 (31.75 x 15.88) (128.60) (200.03) 8.00 (203.20) (333.38) 42M (581.03) (368.30) (831.85) 1.50 x.75 (38.10 x 19.05) (149.23) (212.73) 8.50 (215.90) (365.13) 60M (628.65) (406.40) (908.05) 1.75 x.875 (44.45 x 22.23) 7.00 (177.80) (250.83) (254.00) (387.35) Model K L M N O P R S 1M 7.25 (184.15) 1.25 (31.75).688 (17.48) (161.93) (206.38) 3.50 (88.90) 3.50 (88.90) (117.48) 2M 8.25 (209.55) 1.25 (31.75).688 (17.48) (212.73) (238.13) 4.00 (101.60) 3.50 (88.90) 5.50 (139.70) 4M 8.75 (222.25) 1.25 (31.75).688 (17.48) 9.00 (228.60) (254.00) 4.00 (101.60) 4.00 (101.60) (155.58) 8M (260.35) 1.50 (38.10).813 (20.65) 8.75 (222.25) (273.05) 4.00 (101.60) 4.00 (101.60) 6.75 (171.45) 12M (301.63) 1.50 (38.10) (27.00) (231.78) (288.93) 4.50 (114.30) 4.50 (114.30) 7.50 (190.50) 18M (327.03) 1.75 (44.45) (33.35) (260.35) (330.20) 5.00 (127.00) 5.00 (127.00) (225.43) 30M (374.65) 1.75 (44.45) (33.35) (323.85) (393.70) 5.50 (139.70) 5.50 (139.70) (254.00) 42M (403.23) 2.00 (50.80) (33.35) (368.30) (444.50) 6.00 (152.40) 6.00 (152.40) (285.75) 60M (425.45) 2.00 (50.80) (33.35) (406.40) (482.60) 6.00 (152.40) 6.00 (152.40) (311.15) Certified prints will be furnished for construction purposes after receipt of order. * Shaft dia /.0010, Coupling bore /.0015 Marland Clutch ( ) 21

22 Marland Disconnect CEUHSD CECON Clutch Gear-Type double engagement flexible coupling Shift lever locking assembly Shift Lever Input Shaft "W"-300 lb. A.S.A. Flange. Oil drain line supplied by customer. D Keyway "S"-300 lb. A.S.A. Flange. Oil inlet line supplied by customer. For oil specifications see below. Breather-Filter Output Shaft D Keyway Gear-Type double engagement flexible coupling Driven Machine Driving Machine E E Shaft Gap** F H Usable Shaft Length R 1-1/2 V L R F H Usable Shaft Length Shaft Gap** A K J J K A M Dia. CECON Clutch Rated Torque Capacity HP RPM Oil Supply Ship Wght. lbs. CEUHSD Type lb. ft. Per 100 RPM Maximum Gals. Per Min. (Less Cplgs.) 1M 1, , / M 2, , / M 4, , / M 8, , ,200 12M 12, , ,700 18M 18, , ,500 30M 30, , ,200 42M 42, , ,600 60M 60,000 1,143 3, ,100 Consult applicable local and national safety codes for proper guarding of rotating shafts and couplings. ** Shaft gap per coupling manufacturer or customer specification. To be supplied by customer: This quantity of regular turbine oil for approx S.S.U. at 100 F., at P.S.I. pressure, at a max. inlet temp. of 110 F., filtered to microns. For higher speeds, consult factory 22 Marland Clutch ( )

23 Viewing Window "Customer to Supply Oil pressure gage at oil inlet" T C B U Z Y P O X N N O P Dimensions inches (mm) For Reference Only Model A B C D E* F H J 1M (314.33) 5.75 (146.05) (371.48).50 x.25 (12.70 x 6.35) 2.00 (50.80) 3.75 (95.25) (98.43) (161.93) 2M (369.90) (174.63) (415.93).625 x.313 (15.88 x 7.95) 2.50 (63.50) 4.50 (114.30) (117.48) (187.33) 4M (436.58) 7.75 (196.85) (463.55).875 x.438 (22.23 x 11.13) (84.15) 5.25 (133.35) (136.53) 7.75 (196.85) 8M (547.70) (219.08) (527.05) 1.00 x.50 (25.40 x 12.70) (109.55) 6.75 (171.45) (176.23) (292.10) 12M (623.90) (244.48) (574.68) 1.25 x.625 (31.75 x 15.88) (122.25) 7.50 (190.50) (195.28) (323.85) 18M (681.05) (285.75) (654.05) 1.50 x.75 (38.10 x 19.05) (141.30) (214.33) (219.08) (355.60) 30M (806.45) (323.85) (730.25) 1.50 x.75 (38.10 x 19.05) 6.25 (158.75) (263.53) (269.88) (419.10) 42M (887.43) (361.95) (768.35) 1.75 x.875 (44.45 x 22.23) 7.25 (184.15) (293.70) (300.05) (463.55) 60M (968.38) (393.70) (850.90) 2.00 x 1.00 (50.80 x 25.40) 8.25 (209.55) (320.68) (327.03) (514.35) Model K L M N O P R S 1M (195.28) 1.00 (25.40).688 (17.48) (161.93) 7.25 (184.15) 3.00 (76.20) 3.00 (76.20).50 (12.70) 2M ( ) 1.00( 25.40).688 (17.48) (212.73) 9.25 ( (101.60) 3.50 (88.90).50 (12.70) 4M (277.83) 1.25 (31.75).688 (17.48) 9.00 (228.60) (266.70) 4.00 (101.60) 4.00 (101.60).75 (19.05) 8M (347.68) 1.25 (31.75).813 (20.65) (273.05) (298.45) 4.50 (114.30) 4.50 (114.30).75 (19.05) 12M ( ) 1.50 (38.10).813 (20.65) (304.80) (330.20) 5.00 (127.00) 5.00 (127.00) 1.00 (25.40) 18M (423.88) 1.50 (38.10) (27.00) (349.25) (381.00) 5.50 (139.70) 5.50 (139.70) 1.00 (25.40) 30M (498.48) 1.50 (38.10) (27.00) (400.05) (431.80) 6.00 (152.40) 6.00 (152.40) 1.00 (25.40) 42M (549.28) 1.50 (38.10) (33.35) (431.80) (469.90) 6.50 (165.10) 6.50 (165.10) 1.25 (31.75) 60M (603.25) 1.50 (38.10) (33.35) (457.20) (501.65) 7.00 (177.80) 7.00 (177.80) 1.25 (31.75) Model T U V W X Y Z 1M 8.25 (209.55) 3.75 (95.25) 3.00 (76.20) 1.25(31.75) 9.25 (234.95) (34.93) 5.25 (133.35) 2M 9.25 (234.95) (123.83) (85.73) 1.50(38.10) (285.75) 1.50 (38.10) (155.58) 4M (276.23) (138.10) (92.08) 2.00(50.80) (317.50) 1.75 (44.45) 6.50 (165.10) 8M (307.98) (136.53) (117.48) 2.00(50.80) (349.25) 1.75 (44.45) 6.50 (165.10) 12M (333.38) (150.83) (134.95) 2.50(63.50) (406.40) 2.25 (57.15) 7.50 (190.50) 18M (384.18) (179.40) 5.75 (146.05) 2.50(63.50) (457.20) 2.25 (57.15) 7.50 (190.50) 30M (422.28) (204.80) 7.00 (177.80) 3.00(76.20) (508.00) 2.50 (63.50) 8.25 (209.55) 42M (447.68) (225.43) 7.75 (196.85) 3.00(76.20) (546.10) 2.50 (63.50) 8.25 (209.55) 60M (466.73) 9.50 (241.30) 8.50 (215.90) 3.50(88.90) (577.85) 3.00 (76.20) 9.00 (228.60) Certified prints will be furnished for construction purposes after receipt of order. * Shaft dia /-.0010, Coupling bore / Marland Clutch ( ) 23

24